Enantioselective rhodium/ruthenium photoredox catalysis en route to chiral 1,2-aminoalcohols
作者:Jiajia Ma、Klaus Harms、Eric Meggers
DOI:10.1039/c6cc04397f
日期:——
A rhodium-based chiral Lewis acid catalyst combined with [Ru(bpy)3](PF6)2 as photoredox sensitizer allows for the visible-light-activated redox coupling of [small alpha]-silylamines with 2-acyl imidazoles to afford, after desilylation, 1,2-amino-alcohols in yields...
regioselective intermolecular 1,2‐aryl‐aminoalkylation of alkenes by photoredox/nickel dual catalysis is described here. This three‐component conjunctive cross‐coupling is highlighted by its first application of primary alkyl radicals, which were not compatible in previous reports. The readily prepared α‐silyl amines could be transferred to α‐amino radicals by photo‐induced single electron transfer step
Copper catalyzed <i>N</i>-formylation of α-silyl-substituted tertiary <i>N</i>-alkylamines by air
作者:Yichao Zhao、Lachlan David Bruce、Jianwen Jin、Bo Xia、Philip Wai Hong Chan
DOI:10.1039/d0gc01242d
日期:——
Moreover, it delinates a ligand- and additive-free amine oxidation process mediated by a low-cost metal salt with oxygen from air taking on the role of both the terminal oxidant and as part of the formylation reagent, which is unprecedented in copper catalysis. It also offers the first synthetic method that can selectively generate α-amino radical species as reactive intermediates from α-silylamines under
Catalyst free, visible-light promoted photoaddition reactions between C 60 and N- trimethylsilylmethyl-substituted tertiary amines for synthesis of aminomethyl-1,2-dihydrofullerenes
作者:Suk Hyun Lim、Dae Won Cho、Patrick S. Mariano
DOI:10.1016/j.tet.2017.11.064
日期:2018.1
aminomethyl-substituted fullerenes has been developed. The process, involving catalyst free, visible-light irradiation of 10% EtOH-toluene solutions containing fullerene C60 and N-trimethylsilylmethyl-substituted amines by using a 20 W compact fluorescent lamp, leads to formation of aminomethyl-substituted fullereneadducts in a highly efficient manner. The photoaddition reaction takes place via a pathway initiated